组卷网>知识点选题>第一章 集合
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2 . 已知集合eqId0856443f7bf4428cbc2063e445dbfce3eqId4834771b710b4f328addeeabae1753b8,则eqId170a03e31a0e4656b66452088e998e61(   )
A.eqId43e3162e6d474b33a17444e6bd04e5ddB.eqIdbb43709c4cf7400d8a811bd8e0d37f6cC.eqId1f11616a924e4402b22add26ca7c5514D.eqId7bc540aa5b3040c6ab5bbabaa901921b
5 . 已知集合eqId159317b56fd04c6a8b3f4717cf96bbbe,集合eqId6c9c23959902411d9017c30951c8be85.
(1)用区间表示集合A与集合B
(2)若全集eqIdcafbf1259326491bb9a9edd7e8527be2,求eqId260b2714a813471d8256ff492c0cf731.
8 . (1)设AB是两个非空集合,定义eqId7f8fd8c661564afea10c9469907caf25,已知eqId75ed2ce842344501adb3bedf956b63f2eqId43dbe4b83bc1410b82d9471834d35460,求eqId7f18053ad99a450ea069a73ede08f43e
(2)对任意实数ab,定义运算“*”如下:eqId121f86f2b1dc4bf98c445fe2be925127,求函数eqId40cb472fdcf944ec8f030dd9dde17f75的值域.
9 . (1)设非空集合eqId6a7c38e94b7c464b8df48ede0674a1f4eqId6bf67d6e5e8a4704af4a71921fc3a305,且eqId82343fe4ff704d549a58b9743c81e3a6eqIda771d05242f8473a9bc2cf0f625380e8eqId381bff9f18254a9592099f7be08556e1,若eqId6794f503573b462e8b111fecfca03df1,求实数a的取值范围;
(2)若不等式eqId1ef0285076084a72891091d6c22c3641,当eqIdb129dc1ecbc1404bb2e22b6728ed0d0b时恒成立,求实数a的取值范围.